bug#60411: 29.0.60; minibuffer-next-completion skips first candidate when completions-header-format and completion-show-help are nil

[Juri Linkov]

>> +      (when (and (= n 1)
>> +                 (= (point) (point-min))
>> +                 (get-text-property (point) 'mouse-face)
>> +                 (not (get-text-property (point) 'first-completion)))
>> +        (let ((inhibit-read-only t))
>> +          (add-text-properties (point) (1+ (point)) '(first-completion t)))
>> +        (setq n 0))
>
> Please remove (= n 1) and replace (setq n 0) with (setq n (1- n))
> to support the prefix arg with ‘M-N M-n’.

When n > 0.